/* 案例的css文件 */

*{
    margin: 0;
    padding: 0;
}

body{
    background-color:gainsboro ;
}

.au{
    margin: 0 auto;
}

.container{
    width: 80%;
    height: auto;
   
}

.first{
    width: 1000px;
    height: 80px;
    text-align: center;
    line-height: 80px;
    margin-bottom: 25px;
}

.logo{
    width: 200px;
    height: 80px;
    background-color: aqua;
    float: left;
}
.banner1{
    width: 550px;
    height: 80px;
    background-color: beige;
    float: left;
    margin-left: 25px;
}
.banner2 {
    width: 200px;
    height: 80px;
    background-color:blueviolet;
    float: right;
}

.second{
    width: 1000px;
    height: 30px;
    background-color: pink;
    text-align: center;
    line-height: 30px;
    margin-bottom: 25px;

}

.third{
    width: 1000px;
    height: 425px;
    background-color: yellow;
}

.third_left{
    width: 775px;
    height: 100%;
    background-color: #e07575;
    float: left;

}

.third_right {
    width: 200px;
    height: 100%;
    background-color: #e07575;
    float: right;

}

.up{
    width: 100%;
    height: 200px;
    background-color: bisque;
    margin-bottom: 25px;
}
.down {
    width: 100%;
    height: 200px;
    background-color: bisque;
}


.up01{
    width: 375px;
    height: 200px;
    background-color: red;
    float: left;
}

.up02{
    width: 375px;
    height: 200px;
    background-color: red;
    float:right;
}

.down_item{
    width: 175px;
    height: 200px;
    background-color: aqua;
    float: left;
    margin-right: 25px;
}

.right_item{
    width: 200px;
    height: 125px;
    background-color: black;
    margin-top: 25px;
}